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2252697
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Patent number 2,252,697
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Issue date Aug 19, 1941
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B22 - CASTING POWDER METALLURGY
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2243608
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Patent number 2,243,608
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Issue date May 27, 1941
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Patent number 1,947,916
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1927912
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Patent number 1,927,912
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Issue date Sep 26, 1933
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Issue date Aug 1, 1933
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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1842037
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Patent number 1,842,037
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Issue date Jan 19, 1932
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1817680
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Patent number 1,817,680
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C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
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1809872
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Patent number 1,809,872
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C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
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1803691
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Patent number 1,803,691
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C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
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1802695
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Patent number 1,802,695
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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1802463
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Patent number 1,802,463
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C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
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1792494
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Patent number 1,792,494
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G11 - INFORMATION STORAGE
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1792082
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Patent number 1,792,082
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C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
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1757543
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Patent number 1,757,543
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B44 - DECORATIVE ARTS
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1746751
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Patent number 1,746,751
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1745912
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Patent number 1,745,912
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1744908
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Patent number 1,744,908
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1731790
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Patent number 1,731,790
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1728168
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Patent number 1,728,168
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Issue date Sep 10, 1929
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1720815
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Patent number 1,720,815
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1719824
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Patent number 1,719,824
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Issue date Jul 9, 1929
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1712876
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B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...
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1709729
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Patent number 1,709,729
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C21 - METALLURGY OF IRON
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1708715
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Patent number 1,708,715
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1697086
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E21 - EARTH DRILLING MINING
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1688060
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Patent number 1,688,060
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Issue date Oct 16, 1928
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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1680276
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Patent number 1,680,276
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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1673779
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Patent number 1,673,779
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Issue date Jun 12, 1928
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS